HBO recently debuted a documentary on the life of George H.W. Bush Photo-4214896.57013 - Houston Chronicle

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Former President George H.W. Bush and his wife, Barbara, wave to friends in the crowd during the Republican National Convention in St. Paul, Minn., Tuesday, Sept. 2, 2008.

Former President George H.W. Bush and his wife, Barbara, wave to friends in the crowd during the Republican National Convention in St. Paul, Minn., Tuesday, Sept. 2, 2008.

Photo: Jae C. Hong, AP

Former President George H.W. Bush and his wife, Barbara, wave to... Photo-4214897.57013 - Houston Chronicle

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President Barack Obama meets with form President George H.W. Bush in the Oval Office Saturday, Jan. 30, 2010. (Official White House Photo by Pete Souza)This official White House photograph is being made available for publication by news organizations and/or for personal use printing by the subject(s) of the photograph. The photograph may not be used in materials, advertisements, products, or promotions that in any way suggest approval or endorsement of the President, the First Family, or the White House. less

President Barack Obama meets with form President George H.W. Bush in the Oval Office Saturday, Jan. 30, 2010. (Official White House Photo by Pete Souza)This official White House photograph is being made ... more

President Barack Obama meets with form President George H.W. Bush... Photo-4214898.57013 - Houston Chronicle

Texas billionaire and two-time presidential candidate Ross Perot talk to members of the media before accepting the Command and General Staff College Foundation's 2010 Distinguished Leadership Award Tuesday, April 20, 2010, in Kansas City, Mo. less

Texas billionaire and two-time presidential candidate Ross Perot talk to members of the media before accepting the Command and General Staff College Foundation's 2010 Distinguished Leadership Award Tuesday, ... more

Texas billionaire and two-time presidential candidate Ross Perot talk to members of the media before accepting the Command and General Staff College Foundation's 2010 Distinguished Leadership Award Tuesday, April 20, 2010, in Kansas City, Mo. less

Texas billionaire and two-time presidential candidate Ross Perot talk to members of the media before accepting the Command and General Staff College Foundation's 2010 Distinguished Leadership Award Tuesday, ... more